For those amongst you guys who are aware of the recent changes made to oil formulations (ILSAC GF-5) and are looking for the "best oil" in terms of retained high ZDDP (zinc) addiditve levels, ...here is a handy chart detailing all Mobil1 products:
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I found this valuable piece during my research, and for me and my 2000 Impreza Coupe 2.2L it is going to be a mix of 50/50 Mobil1 15w-50 and Mobil1 High Milage 10w-30. In the past, for many years it used to be Mobil1 15w-50 and regular Mobil1 10w-30 (which today has low zinc levels).My driving style is semi spirited, high speed, high rpms, on lots of mountainous roads and highways.
Basia